2018 WAEC (WASSCE) Biology Past Questions & Answers

Question 1

Which of the following structures would carry out cellular respiration? A

Accepted Answer

A. germinating seed

Answer

B. decolorised leaf

Answer

C. dry leaf

Answer

D. boiled cowpea

Question 2

The diagram above is an illustration of an experimental set-up to demonstrate a property of soil. The property of soil demonstrated is

Accepted Answer

D. texture

Answer

A. particle size

Answer

B. capillarity

Answer

C. colour

Question 3

Which of the following statements about the response of neurones to stimulus is correct?

Accepted Answer

D. Intensity of stimulus must reach a threshold value before the neurons can be excited

Answer

A. Neurons respond to stimulus of any strength

Answer

B. Neurons respond to all stimuli applied in rapid succession

Answer

C. Neurons respond more rapidly during the absolute refraction period

Question 4

The diagrams above are illustrations of an experimental set-up to demonstrate a type of tropic response in plants. The type of response demonstrated is

A.phototropism
B.geotropism
C.hydrotropism
D.thigmotropism

Show answer

Answer: A. phototropism

Get a step-by-step AI explanation in the app Get a step-by-step AI explanation in the app

Accepted Answer

C. S

Answer

A. P

Answer

B. Q

Answer

D. R

Question 5

An association between living organisms in which one lives on and feeds at the expense of the other is known as

Accepted Answer

C. parasitism

Answer

A. commensalism

Answer

B. predation

Answer

D. mutualism

Question 6

Patients X and Y were likely transferred with blood of genotype

Accepted Answer

C. BO

Answer

A. OO

Answer

B. AO

Answer

D. AA

Question 7

The odontoid process is found on the

Accepted Answer

A. axis vetebra

Answer

B. atlas vetebra

Answer

C. thoracic vetebra

Answer

D. sacral vetebra

Question 8

The chemical bond that holds the bases of the two strands of DNA together is

Accepted Answer

B. hydrogen bond

Answer

A. oxygen bond

Answer

C. electrovalent bond

Answer

D. covalent bond

Question 9

One major difference between plant and animals nutrition is the ability of plants to synthesize

Accepted Answer

A. Food for plants and animals

Answer

B. Water for plants

Answer

C. Water for animals

Answer

D. Food for plants only

Question 10

In evolution, fossils are naturally preserved in

Accepted Answer

A. rocks

Answer

B. water

Answer

C. chemicals

Answer

D. trees

Question 11

Which of the following organelles is found only in plant cells?

Accepted Answer

D. Plastids

Answer

A. Mitochondria

Answer

B. Ribosomes

Answer

C. Lysosomes

Question 12

The source of energy required by plants during food production is

Accepted Answer

C. Sunlight

Answer

A. Photosynthesis

Answer

B. Chlorophyll

Answer

D. Microorganisms

Question 13

What level of organization is Spirogyra?

Accepted Answer

C. Cell

Answer

A. System

Answer

B. Organ

Answer

D. Tissue

Question 14

The theory supports

Accepted Answer

A. natural selection

Answer

B. struggle for survival

Answer

C. independent assortment

Answer

D. the use and disuse of body parts

Question 15

Which of the following statements is true about arthropods?

Accepted Answer

A. Prothorax bears only legs

Answer

B. Mesothorax bears only legs

Answer

C. Metathorax bears only wings

Answer

D. Prothorax bears only wings

Question 16

Conservation of wildlife is necessary mainly because

Accepted Answer

C. it prevents extinction of species

Answer

A. wild species cannot resist disease better than their domesticated species

Answer

B. many predator wild animals help in the control of pests

Answer

D. many people derive pleasure from observing wild animals

Question 17

The structures for gaseous exchange in breathing roots are

Accepted Answer

B. lenticels

Answer

A. stomata

Answer

C. cuticle

Answer

D. mitochondria

Question 18

The thyroid gland is found at the base of the

Accepted Answer

C. Neck

Answer

A. Midbrain

Answer

B. Kidney

Answer

D. Liver

Question 19

Genes that remain linked are those

Accepted Answer

A. close to each other on the chromosomes

Answer

B. on the same locus on the chromosomes

Answer

C. on the homologous chromosomes

Answer

D. which are allelic pair

Question 20

What should the hospital have done to prevent X from showing the symptom described above? Patient X should have

Accepted Answer

D. undergone malaria test

Answer

A. undergone an agglutination test

Answer

B. been asked for the blood group

Answer

C. been screened for HIV

Question 21

Active transport differs from diffusion in that active transport

Accepted Answer

B. allows the movement of substances against concentration gradient

Answer

A. is a very fast process

Answer

C. takes place in both light and dark reaction of photosynthesis

Answer

D. occurs in both plant and animal tissues

Question 22

Xerophytes have the following characteristics aimed at conserving water except

Accepted Answer

B. broad leaf surfaces

Answer

A. thick cuticle

Answer

C. sunken stomata

Answer

D. waxy cuticle

Question 23

A plant cell has 14 chromosomes prior to mitosis. What is the number of chromosomes in the daughter cells?

Accepted Answer

A. 14

Answer

B. 56

Answer

C. 28

Answer

D. 7

Question 24

Which of the following practices may lead to infection of the eye? Use of

Accepted Answer

A. contact lenses

Answer

B. convex lenses

Answer

C. biconcave lenses

Answer

D. concave lenses

Question 25

The scientist who introduced binomial nomenclature in the classification of organisms was

Accepted Answer

B. Carolus Linnaeus

Answer

A. Charles Darwin

Answer

C. John Ray

Answer

D. Louis Pasteur

Question 26

Which of the following dental formulae represents the dentition in rabbits?

Accepted Answer

A. $I\frac{2}{1}$ $C\frac{0}{0}$ $P\frac{3}{2}$ $M\frac{3}{3}$

Answer

B. $I\frac{2}{2}$ $C\frac{1}{1}$ $P\frac{2}{2}$ $M\frac{3}{3}$

Answer

C. $I\frac{1}{2}$ $C\frac{0}{0}$ $P\frac{2}{3}$ $M\frac{3}{3}$

Answer

D. $I\frac{2}{1}$ $C\frac{0}{1}$ $P\frac{3}{2}$ $M\frac{3}{3}$

Question 27

The most important factor(s) that influence(s) the ecological niche of an organism is/ are the

Accepted Answer

D. competition for food and space

Answer

A. water, light and predator-prey relationship

Answer

B. food and water availability

Answer

C. physical environment

Question 28

The streaming movement of cytoplasm within the Paramecium is known as

Accepted Answer

C. Cyclosis

Answer

A. Transpiration

Answer

B. Digestion

Answer

D. Osmosis

Question 29

The duodenum of a person was surgically removed. Which of the following substances would have their digestion affected?

Accepted Answer

D. starch, protein and lipids

Answer

A. starch and protein only

Answer

B. starch and lipids

Answer

C. starch, peptones and maltose

Question 30

By what process is starch converted into maltose?

Accepted Answer

A. Hydrolysis

Answer

B. Condensation

Answer

C. Translocation

Answer

D. Photosynthesis

Question 31

Which of the following is not a social insect?

Accepted Answer

B. housefly

Answer

A. termite

Answer

C. honeybee

Answer

D. ant

Question 32

Which of the following disease ic caused by a bacterium?

Accepted Answer

C. syphilis

Answer

A. ringworm

Answer

B. poliomyelitus

Answer

D. malaria

Question 33

The greatest contribution to genetic studies was made by

Accepted Answer

A. Gregor Mendel

Answer

B. Thomas Morgan

Answer

C. Charles Darwin

Answer

D. Robert Hooke

Question 34

Which of the following is NOT an excretory product of animals?

Accepted Answer

D. oxygen

Answer

A. carbondioxide

Answer

B. urea

Answer

C. sweat

Question 35

The diagrams above are illustrations of an experimental set-up to demonstrate a type of tropic response in plants. The type of response demonstrated is

Accepted Answer

A. phototropism

Answer

B. geotropism

Answer

C. hydrotropism

Answer

D. thigmotropism

Question 36

The exchange of genes between homologous chromosomes is called

Accepted Answer

A. crossing over

Answer

B. back cross

Answer

C. test cross

Answer

D. mutation

Question 37

Ultrafiltration in the kidney takes place in the

Accepted Answer

D. Bowman's Capsule

Answer

A. Renal vein

Answer

B. Medulla

Answer

C. Loop of Henle

Question 38

In an ecosystem, the least efficient energy transfer link is from the

Accepted Answer

B. sun to producers

Answer

A. secondary consumers to decomposers

Answer

C. primary consumers to secondary consumers

Answer

D. producer to primary consumers

Question 39

Which of the following instruments is used to determine the turbidity of water?

Accepted Answer

C. secchi disc

Answer

A. hygrometer

Answer

B. hydrometer

Answer

D. rain gauge

Question 40

Which of the following statements would be a correct observation at the end of the experiment? Water moves

Accepted Answer

A. highest in sandy soil

Answer

B. lowest in loamy soil

Answer

C. to the same level in all soil types

Answer

D. highest in clayey soil

Question 41

A seedling was made to stand in a solution of red ink for three hours and a transverse section of the stem was examined under the microscope. The process being investigated was

Accepted Answer

B. ascent of water through the xylem

Answer

A. the importance of micro elements to plants

Answer

C. diffusion of colored substances

Answer

D. distribution of food in plants

Question 42

When large numbers of organisms share limited space and resources, the immediate result is

Accepted Answer

C. competition

Answer

A. extinction

Answer

B. emigration

Answer

D. immigration

Question 43

An example of homeostasis in living organisms is

Accepted Answer

A. cooling effect resulting from evaporation of water from the body surface

Answer

B. root hairs of a plant growing towards the source of light

Answer

C. changing of the body colour of chameleon to match the colour of the foliage on which it is resting

Answer

D. the release of phosphorus into the phloem of a plant growing in a phosphorus-deficient soil

Question 44

The ascent of water in tall trees is mainly due to

Accepted Answer

B. transpiration pull

Answer

A. adhesive forces

Answer

C. root pressure

Answer

D. cohesive forces

2018 WAEC (WASSCE) Biology Past Questions

Questions

Frequently asked questions

How do I prepare for WAEC (WASSCE) Biology?

Where can I find WAEC (WASSCE) Biology past questions?

How close is the DeeepSolve CBT simulator to the real WAEC (WASSCE)?

Are the AI explanations accurate?